xfx radeon rx 550 black screens after update.

I had purchased a XFX radeon rx550 4gb about a week ago from best buy to replace my radeon HD 6950 1gb, windows had automatically installed the driver. while going through device manager yesterday I had noticed my driver was outdated by about six months so decided to update my driver, so I went to amd's website to update it and the installer was working fine until it finished. it black screened and my monitor said it was not supported. after loading up safe mode i reinstalled the old driver to the same screen I updated my bios on my Gigabyte AB350-Gaming motherboard to no avail. I have read various other forums and still cannot get the driver to work. if you have a suggestion or another post that helps please let me know.